US6799648B2 - Method of producing downhole drill bits with integral carbide studs - Google Patents

Method of producing downhole drill bits with integral carbide studs Download PDF

Info

Publication number
US6799648B2
US6799648B2 US10/229,192 US22919202A US6799648B2 US 6799648 B2 US6799648 B2 US 6799648B2 US 22919202 A US22919202 A US 22919202A US 6799648 B2 US6799648 B2 US 6799648B2
Authority
US
United States
Prior art keywords
drill bit
portion
carbide
grinding
studs
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active, expires
Application number
US10/229,192
Other versions
US20040040752A1 (en
Inventor
Kristin R. Brandenberg
John R. Keough
Kathy L. Hayrynen
Gerald J. Wurtsmith
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Applied Process Inc
Original Assignee
Applied Process Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Applied Process Inc filed Critical Applied Process Inc
Priority to US10/229,192 priority Critical patent/US6799648B2/en
Assigned to APPLIED PROCESS, INC. reassignment APPLIED PROCESS, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BRANDENBERG, KRISTIN R., HAYRYNEN, KATHY L., WURTHSMITH, GERALD J., KEOUGH, JOHN R.
Publication of US20040040752A1 publication Critical patent/US20040040752A1/en
Publication of US6799648B2 publication Critical patent/US6799648B2/en
Application granted granted Critical
Assigned to THE HUNTINGTON NATIONAL BANK reassignment THE HUNTINGTON NATIONAL BANK SECURITY INTEREST Assignors: APPLIED PROCESS, INC.
Assigned to ALDINE CAPITAL FUND II, L.P., AS AGENT reassignment ALDINE CAPITAL FUND II, L.P., AS AGENT SECURITY INTEREST Assignors: APPLIED PROCESS, INC.
Application status is Active legal-status Critical
Adjusted expiration legal-status Critical

Links

Images

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/42Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
    • E21B10/43Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00Casting in, on, or around objects which form part of the product
    • B22D19/06Casting in, on, or around objects which form part of the product for manufacturing or repairing tools
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/46Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/56Button type inserts

Abstract

A down hole rock drill bit and method of manufacture of the same comprising a cast metal drill bit body having a plurality of hardened carbide studs partially cast in the drill bit body. The drill bit is cast by means of a foam pattern replicating the drill bit, typically made from polystyrene within which a plurality of carbide studs are partially inserted into the grinding surface of the foam drill bit model. The model is then subsequently supported within a vessel of sand and molten metal is poured over the foam, vaporizing it and taking the exact form of the foam pattern and permanently retaining the carbide studs within the metal drill bit.

Description

FIELD OF THE INVENTION

The present invention relates to earth boring drill bits. Specifically, this invention relates to a method of producing/manufacturing earth boring bits with integral carbide studs for downhole drilling through rock and other material.

BACKGROUND OF THE INVENTION

Rotary drill bits used in earth drilling are generally comprised of a cast, forged or machined material of significant hardness, to keep wear to the drill bit head to a minimum. To further enhance the effect of the drill, drill bit heads often utilize a plurality of hardened studs of tungsten carbide or other hard material mounted in a configuration on the head of the drill bit to increase the durability and efficiency of the bit. Conventionally, these studs are mounted in their seats upon the head of the drill bit by brazing or cementing them to the drill bit, which is economically inefficient, time consuming, and often results in the loss of studs during vigorous drilling. Furthermore, it is often necessary for the bits to be heavily machined after casting or forging prior to the attachment thereto of any carbide studs, requiring additional labor and costs.

U.S. Pat. No. 4,607,712 to inventor Larsson teaches a rock drill bit with studded inserts positioned within drilled holes, following the casting of the drill bit. This additional step of requiring the bit to be machined prior to the attachment of the studs requires significant amounts of resources and time.

U.S. Pat. No. 4,181,187 to inventor Lumen, teaches a method of attaching inserts to a rock drill bit using a press to force the hardened metal inserts into pre-bored holes in the rock drill bit head. Exemplifying the obstacle of extra tooling of the drill bit head following the casting, the present invention overcomes this by providing a cast drill bit head with hardened stud inserts already attached to the drill bit head during the casting process.

U.S. Pat. No. 4,499,795 to inventor Radtke teaches another method of drill bit manufacture wherein soft iron or steel plugs are embodied in the mold. After casting, the plugs are subsequently drilled out and cutting studs are inserted in their place. This extra machining significantly increases production time and cost to the drill bit.

U.S. Pat. No. 4,014,395 to inventor Pearson discloses a rock drill bit assembly wherein the hardened drill inserts are maintained in pre-drilled apertures in the head of the drill bit by tapered sleeves that are pressed into place around the studs. The addition of the sleeves increases production costs as well as the possibility of the incidental release of the studded insert due to the vibrations caused by the earth drilling process.

The present invention overcomes these problems, by providing a method of manufacturing a downhole drill bit with pre-cast carbide studs, creating a time and cost efficient alternative to the traditional methods of manufacturing requiring post-casting attachment of the carbide studs, followed by subsequent machining prior to use of the drill bit.

SUMMARY OF THE INVENTION

It is therefore an object of the present invention to provide for a downhole drill bit for earth boring, implementing a plurality of hardened carbide studs in the drill bit head which can be manufactured easily and economically.

A more specific object of the present invention is to provide a means for manufacturing a downhole drill bit for earth boring from Austempered ductile iron, or iron hardened by other means, utilizing a lost-foam casting process.

It is a further object of the present invention to provide for a means of casting a downhole drill bit head so as to attach a plurality of hardened carbide studs to the head of the drill bit during the casting process.

It is a more specific object of the present invention to provide a copper plating to the carbide studs prior to being set into the foam tooling thereby protecting the carbide itself during the subsequent Austemper heat treatment process.

It is another object of the present invention to embody a plurality of steel water tubes set into the foam tooling providing for appropriate flow of cooling liquid to the drill bit head without the need for post-casting machining of these passageways.

The foregoing objects are accomplished in the preferred embodiment of the present invention by providing a downhole drill bit implementing hardened carbide studs and method of manufacturing the same. The drill bit, cast from ductile iron, is formed by the lost-foam process. This process consists of making a foam pattern, generally out of polystyrene, having the exact geometry of the desired finished metal part. After a short stabilization period, the pattern is dipped into a solution containing a suspended refractory. The refractory material coats the exterior surface of the foam, leaving a thin, heat-resistant, semi-permeable coating, that is subsequently dried. When the drying is complete, the foam is suspended in a container that is agitated while sand is poured in and around the foam pattern, filling all voids in the coated pattern. The sand provides mechanical support to the thin coating.

Molten metal, preferably ductile iron, is then poured into the mold where the molten metal subsequently vaporizes the foam and replaces its volume. The solidified metal is formed into a nearly exact replica of the pattern which is subsequently heat treaded, preferably by the Austempering process, for application.

In this specific application of the lost foam casting process, a plurality of hardened carbide studs are partially inserted into the foam tooling in a predetermined pattern that maximizes efficiency of the drill, prior to the molten metal being poured into the mold. The carbide studs are plated in copper or some other suitable material prior to being set in the foam tooling to prevent degradation of the carbide material that would otherwise result from the subsequent heat treatment process. The carbide studs can be of various shapes and sizes. The studs are “blown” into the foam molds and have the necessary undercut(s) to secure them into the solidified metal and expose the appropriate cutting surface.

Not only are the carbide studs more easily attached to the drill bit head by this invention in not requiring subsequent machining of the drill bit head prior to attachment thereto of the carbide studs, but also the studs are held more securely than those implemented by alternative means, and thus the drilling head and the bits last longer and are more durable for severe drilling applications.

Further areas of applicability of the present invention will become apparent from the detailed description provided hereinafter. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will become more fully understood from the detailed description and the accompanying drawings, wherein:

FIG. 1 is a partial perspective view of the downhole drill bit of the present invention.

FIG. 2 is cross-sectional side view of the downhole drill bit of the present invention showing the steel tube water supply means.

FIG. 3 is a top view of one embodiment of the downhole drill bit of the present invention.

FIG. 4 is a top view of an alternative embodiment of the downhole drill bit of the present invention.

FIG. 5 shows a top view of a third embodiment of the downhole drill bit of the present invention.

FIG. 6 shows a cross sectional close-up view of a typical carbide stud of the present invention attached to the drill bit head.

FIG. 7 shows a cross-sectional close-up view of an alternative embodiment of the carbide stud of the present invention.

FIG. 8 shows a cross sectional side view of a carbide stud, covered by a copper plating or other suitable material.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The following description of the preferred embodiment(s) is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.

Referring to the drawings by numeral, and more specifically to FIG. 1, the preferred embodiment of the present invention is shown generally numbered as 10. This drill bit comprises a generally cylindrically shaped cast iron body 12 for attaching to a down hole drilling apparatus of a conventional drill string. The body 12 is formed of cast iron or any suitable alloy, especially a high temperature alloy which will provide for greater strength and endurance. The bit body 12 has an upper grinding portion 14 and a lower shaft portion 16 which subsequently attaches to a drilling apparatus by conventional means.

Both the upper portion 14 and the lower portion 16 are separated by an annular groove 18, have a plurality of longitudinal recesses 20 within the surface of the bit, created by the mold within which the bit 10 is formed. These recesses 20 allow for material and debris that has been drilled out by the upper grinding portion 14 of the drill bit 10 to be displaced and conveyed away from the specific area of drilling, preventing the clogging of the hole with recently created debris. The recesses 20 may further provide for leading edge 21 that shaves and shapes the walls of the hole as the drill bit 10 progresses through the rock.

The upper portion 14 has a tapered section 22 providing a transition between the cylindrical sides of the drill bit and the grinding face 24 of the upper portion 14. Both the tapered section 22 and the grinding face 24 have a plurality of semi-spherical, carbide studs 30 embedded within the bit body 12, projecting outward for abrasively grinding the rock or other material through which the drill bit 10 is being used.

Referring now to FIG. 2, a partial cross-sectional view of the upper grinding portion 14 of the drill bit 10 is shown. A plurality of steel tubes 26 having an inner channel 27 are positioned within the drill bit body 12, terminating in an aperture through the grinding face 24 of the upper portion 14. These channels 27 provide for the movement of cooling fluid to the face 24 of the drill bit 10, preventing over-heating of the drill bit due to excessive friction. The steel tubes 26 are cast in the metal body 12 of the drill bit 10 simultaneously with the carbide studs 30 during the casting process.

FIGS. 3, 4 and 5, show frontal views of the upper grinding portion of the drill bit 10. The orientation of the carbide studs 30 and the steel cooling tubes 26 as shown can be arranged in a variety of patterns depending of the desired use or application. These illustrations in no way intend to exhaust the possible arrangements of these elements and are intended to be covered by the present invention.

In this particular invention as previously pointed out, the arrangement as well as the method of assembly and retention of the carbide studs 30 is especially important to the operation of the drill bit 10. The drill bit 10, designed to cut through rock or other hard material is subject to substantial vibration and stress. Therefore the carbide studs 30 need to be retained within the drill bit 10 in a manner which would prevent dislodgement from the various vibrations and stresses involved in the drilling process.

Specifically referring to FIGS. 6 and 7, cross sectional views are shown of the typical carbide studs of the present invention as partially embedded in the drill bit body 12. Each typical carbide stud 30, comprising a generally hour-glass shape, has a semispherical grinding surface 32, a mounting end 33, and a narrower body portion 34 extending within the cast bit body 12. The narrower stud portion 34 provides for a retaining means to engage with the casting iron of the bit body 12, maintaining the stud 30 partially within the bit body 12 so as to expose the grinding surface 32 once the casting iron has cooled.

FIGS. 6 and 7 illustrate different embodiments of the carbide studs 30 and do not exhaust the possibilities of other carbide stud designs which are intended to be covered within the scope of this invention. The studs 30 as mentioned previously, are cast into the drill bit body 12 during the casting process, whereas molten iron flows around the narrow portion 34 of each stud 30 and solidifies, holding the stud 30 in position

The casting process used in forming the drill bit is the lost-foam process. This process consists of first making a foam pattern, generally out of polystyrene, having the geometry of the desired finished metal part. After a short stabilization period, the pattern is dipped into a liquid solution containing a suspended refractory. The refractory material coats the exterior surface of the foam tooling 38 leaving a thin, heat-resistant, semi-permeable coating that is subsequently dried. When the drying is complete, the foam pattern 38 is suspended in a special container that is agitated while sand is poured in and around the foam pattern, filling all voids in the coated pattern. The sand provides mechanical support to the thin coating.

Molten metal, in this case, ductile iron, is then poured into the mold where the molten metal subsequently vaporizes the foam pattern 38. The solidified metal replaces the volume of the foam and leaves a nearly exact replica of the pattern. It is subsequently heat treated, preferably by Austempering, to harden the newly cast part for application.

In this specific application of the lost foam casting process for creating the drill bit 10 of the present invention, the plurality of carbide studs 30 are partially inserted into the foam tooling 38 so as to maintain the semispherical grinding portion exposed to the refractory coat and the sand. The studs 30 are arranged in a predetermined orientation that maximizes efficiency of the drill prior to the molten metal being poured into the foam pattern. Referring now specifically to FIG. 8, an individual carbide stud 30 partially mounted within the drill bit body 12 is shown. The carbide studs are plated in a thin layer of copper 40 or other suitable material prior to being set in the foam tooling 38 to protect the carbide and prevent degradation of the stud 30 that would otherwise result from the subsequent Austempering or other heat treatment process.

The casting process provides for efficient integration of the carbide studs 30 into the bit body 12, thereby preventing their incidental release during use of the drill bit 10 due to the annular recess 33 around each individual stud 30 engaging with the metal used to create the bit body 12. During use of the drill bit 10, the copper plating or other suitable material 40 rapidly wears off from the abrasion with the rock material, revealing the carbide grinding surfaces 32 which are significantly resistant to wear.

The description of the invention is merely exemplary in nature and, thus, variations that do not depart from the gist of the invention are intended to be within the scope of the invention. Such variations are not to be regarded as a departure from the spirit and scope of the invention.

Claims (2)

What is claimed is:
1. A carbide studded drill bit for use in drilling through rock and earth comprising:
a cast metal body having an upper grinding portion and a lower shaft portion;
a plurality of longitudinal recesses within said upper and lower portions, said upper portion terminating in a grinding face, said lower portion having means of attachment to a drilling apparatus;
at least one longitudinal steel tube cast in said body, said steel tube having a channel running there through, terminating in an aperture in said grinding face;
a plurality of carbide studs attached to said upper grinding portion of said drill bit in an outwardly projecting orientation from said grinding surface, said carbide studs having an appropriately shaped abrasive end, a middle portion, and a mounting end, said middle portion being narrower than said abrasive end and said mounting end.
2. A carbide studded drill bit for use in drilling through rock and earth comprising:
a cast metal body having an upper grinding portion and a lower shaft portion;
a plurality of longitudinal recesses within said upper and lower portions, said upper portion terminating in a grinding face, said lower portion having means of attachment to a drilling apparatus;
at least one longitudinal steel tube cast in said body, said steel tube having a channel running there through, terminating in an aperture in said grinding face;
a plurality of carbide studs attached to said upper grinding portion of said drill bit in an outwardly projecting orientation from said grinding surface, said carbide studs having an appropriately shaped abrasive end, a middle portion, and a mounting end, said middle portion being narrower than said abrasive end and said mounting end, said carbide studs are mounted in said upper grinding portion of said drill bit so as to expose said abrasive end.
US10/229,192 2002-08-27 2002-08-27 Method of producing downhole drill bits with integral carbide studs Active 2022-10-10 US6799648B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US10/229,192 US6799648B2 (en) 2002-08-27 2002-08-27 Method of producing downhole drill bits with integral carbide studs

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/229,192 US6799648B2 (en) 2002-08-27 2002-08-27 Method of producing downhole drill bits with integral carbide studs
US10/957,270 US7506705B2 (en) 2002-08-27 2004-10-01 Method of producing downhole drill bits with integral carbide studs

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US10/957,270 Continuation US7506705B2 (en) 2002-08-27 2004-10-01 Method of producing downhole drill bits with integral carbide studs

Publications (2)

Publication Number Publication Date
US20040040752A1 US20040040752A1 (en) 2004-03-04
US6799648B2 true US6799648B2 (en) 2004-10-05

Family

ID=31976184

Family Applications (2)

Application Number Title Priority Date Filing Date
US10/229,192 Active 2022-10-10 US6799648B2 (en) 2002-08-27 2002-08-27 Method of producing downhole drill bits with integral carbide studs
US10/957,270 Active US7506705B2 (en) 2002-08-27 2004-10-01 Method of producing downhole drill bits with integral carbide studs

Family Applications After (1)

Application Number Title Priority Date Filing Date
US10/957,270 Active US7506705B2 (en) 2002-08-27 2004-10-01 Method of producing downhole drill bits with integral carbide studs

Country Status (1)

Country Link
US (2) US6799648B2 (en)

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050039954A1 (en) * 2002-08-27 2005-02-24 Brandenberg Kristin R. Method of producing downhole drill bits with integral carbide studs
US20050067196A1 (en) * 2003-08-13 2005-03-31 Ramamurthy Viswanadham Shaped inserts with increased retention force
US20060096788A1 (en) * 2002-11-07 2006-05-11 Stefan Virtanen Reamer assembly
US20070108650A1 (en) * 2005-06-27 2007-05-17 Mirchandani Prakash K Injection molding fabrication method
US20100296961A1 (en) * 2009-05-19 2010-11-25 Debruin Mark Carbidic outer edge ductile iron product, and as cast surface alloying process
US20100307838A1 (en) * 2009-06-05 2010-12-09 Baker Hughes Incorporated Methods systems and compositions for manufacturing downhole tools and downhole tool parts
US8272816B2 (en) 2009-05-12 2012-09-25 TDY Industries, LLC Composite cemented carbide rotary cutting tools and rotary cutting tool blanks
US8403080B2 (en) 2004-04-28 2013-03-26 Baker Hughes Incorporated Earth-boring tools and components thereof including material having hard phase in a metallic binder, and metallic binder compositions for use in forming such tools and components
US8459380B2 (en) 2008-08-22 2013-06-11 TDY Industries, LLC Earth-boring bits and other parts including cemented carbide
US8490674B2 (en) 2010-05-20 2013-07-23 Baker Hughes Incorporated Methods of forming at least a portion of earth-boring tools
US8647561B2 (en) 2005-08-18 2014-02-11 Kennametal Inc. Composite cutting inserts and methods of making the same
US8697258B2 (en) 2006-10-25 2014-04-15 Kennametal Inc. Articles having improved resistance to thermal cracking
US8790439B2 (en) 2008-06-02 2014-07-29 Kennametal Inc. Composite sintered powder metal articles
US8789625B2 (en) 2006-04-27 2014-07-29 Kennametal Inc. Modular fixed cutter earth-boring bits, modular fixed cutter earth-boring bit bodies, and related methods
US8800848B2 (en) 2011-08-31 2014-08-12 Kennametal Inc. Methods of forming wear resistant layers on metallic surfaces
US8905117B2 (en) 2010-05-20 2014-12-09 Baker Hughes Incoporated Methods of forming at least a portion of earth-boring tools, and articles formed by such methods
US8978734B2 (en) 2010-05-20 2015-03-17 Baker Hughes Incorporated Methods of forming at least a portion of earth-boring tools, and articles formed by such methods
US9016406B2 (en) 2011-09-22 2015-04-28 Kennametal Inc. Cutting inserts for earth-boring bits
US9266171B2 (en) 2009-07-14 2016-02-23 Kennametal Inc. Grinding roll including wear resistant working surface
US9428822B2 (en) 2004-04-28 2016-08-30 Baker Hughes Incorporated Earth-boring tools and components thereof including material having hard phase in a metallic binder, and metallic binder compositions for use in forming such tools and components
US9643236B2 (en) 2009-11-11 2017-05-09 Landis Solutions Llc Thread rolling die and method of making same
USD805114S1 (en) * 2016-01-26 2017-12-12 Roy Jones Traveling rotary valve
USD823908S1 (en) * 2015-05-29 2018-07-24 Atlas Copco Secoroc Ab Rock drill bit
USD826299S1 (en) * 2015-07-17 2018-08-21 The State Of Queensland Through Its Department Of Agriculture And Fisheries Drill corer

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20321302U1 (en) * 2003-08-07 2006-09-14 Stahlwerke Bochum Gmbh Impact tool for e.g. hammer mill reducing metal or stone has highly wear-resistant molding cast into main body of ductile steel alloy
US7527110B2 (en) * 2006-10-13 2009-05-05 Hall David R Percussive drill bit
US20100108398A1 (en) * 2008-11-06 2010-05-06 Dongmin Niu Percussion Rock Drilling Bit with More Efficient Flushing
EP2586960B1 (en) * 2011-10-27 2016-01-13 Sandvik Intellectual Property AB Drill bit having a sunken button and rock drilling tool for use with such a drill bit
CN103266854B (en) * 2013-05-14 2015-01-14 常州大学 Hydraulic drive percussion primary-secondary drilling bit
CN104929527B (en) * 2015-05-29 2017-05-31 胜利油田盛辉石油技术开发有限责任公司 A drill bit having a diamond compact
GB2540205A (en) * 2015-07-10 2017-01-11 Nov Downhole Eurasia Ltd Structures Fabricated Using Foam Elements
JP1569589S (en) * 2016-07-14 2017-02-20
JP1569597S (en) * 2016-07-14 2017-02-20
JP1569599S (en) * 2016-07-14 2017-02-20
CN107855497A (en) * 2017-11-02 2018-03-30 成立 Multi-layer carbonization quenching crushing and drilling tool and manufacturing process thereof
CN107876737A (en) * 2017-11-02 2018-04-06 成立 Multi-layer carbonization quenching crushing and drilling tool and manufacturing technology thereof

Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4014395A (en) 1974-12-05 1977-03-29 Smith-Williston, Inc. Rock drill bit insert retaining sleeve assembly
US4073354A (en) 1976-11-26 1978-02-14 Christensen, Inc. Earth-boring drill bits
US4181187A (en) 1977-03-03 1980-01-01 Sandvik Aktiebolag Rock drill bit with stress relief insert sockets
US4442909A (en) 1981-09-21 1984-04-17 Strata Bit Corporation Drill bit
US4499795A (en) 1983-09-23 1985-02-19 Strata Bit Corporation Method of drill bit manufacture
US4607712A (en) 1983-12-19 1986-08-26 Santrade Limited Rock drill bit
US4782903A (en) 1987-01-28 1988-11-08 Strange William S Replaceable insert stud for drilling bits
US4877096A (en) 1987-11-17 1989-10-31 Eastman Christensen Company Replaceable cutter using internal ductile metal receptacles
US4880278A (en) 1986-12-19 1989-11-14 Tomlinson Peter N Cutting tool for a mining machine
US5025875A (en) * 1990-05-07 1991-06-25 Ingersoll-Rand Company Rock bit for a down-the-hole drill
US5588497A (en) 1993-10-28 1996-12-31 Galison Drilling (Proprietary) Limited Mounting drill buttons
US5615747A (en) * 1994-09-07 1997-04-01 Vail, Iii; William B. Monolithic self sharpening rotary drill bit having tungsten carbide rods cast in steel alloys
US5794728A (en) * 1995-06-20 1998-08-18 Sandvik Ab Percussion rock drill bit
US5810103A (en) 1996-12-03 1998-09-22 Sylvan Engineering Company Method and apparatus for mounting PCD compacts
US6105693A (en) * 1999-02-18 2000-08-22 Sandvik Ab Partially enhanced percussive drill bit
US6276467B1 (en) * 1999-10-25 2001-08-21 Driltech Mission Llc Percussive rock drill bit with asymmetric wing

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
UST970002I4 (en) * 1976-11-01 1978-05-02 Smith International, Inc. Cutting elements for drill bits
US4422909A (en) * 1979-12-17 1983-12-27 Occidental Chemical Corporation Electrolytic process for the manufacture of alkali metal halate
US5433280A (en) * 1994-03-16 1995-07-18 Baker Hughes Incorporated Fabrication method for rotary bits and bit components and bits and components produced thereby
US5904212A (en) * 1996-11-12 1999-05-18 Dresser Industries, Inc. Gauge face inlay for bit hardfacing
US6068072A (en) * 1998-02-09 2000-05-30 Diamond Products International, Inc. Cutting element
US6454030B1 (en) * 1999-01-25 2002-09-24 Baker Hughes Incorporated Drill bits and other articles of manufacture including a layer-manufactured shell integrally secured to a cast structure and methods of fabricating same
US6799648B2 (en) * 2002-08-27 2004-10-05 Applied Process, Inc. Method of producing downhole drill bits with integral carbide studs

Patent Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4014395A (en) 1974-12-05 1977-03-29 Smith-Williston, Inc. Rock drill bit insert retaining sleeve assembly
US4073354A (en) 1976-11-26 1978-02-14 Christensen, Inc. Earth-boring drill bits
US4181187A (en) 1977-03-03 1980-01-01 Sandvik Aktiebolag Rock drill bit with stress relief insert sockets
US4442909A (en) 1981-09-21 1984-04-17 Strata Bit Corporation Drill bit
US4499795A (en) 1983-09-23 1985-02-19 Strata Bit Corporation Method of drill bit manufacture
US4607712A (en) 1983-12-19 1986-08-26 Santrade Limited Rock drill bit
US4880278A (en) 1986-12-19 1989-11-14 Tomlinson Peter N Cutting tool for a mining machine
US4782903A (en) 1987-01-28 1988-11-08 Strange William S Replaceable insert stud for drilling bits
US4877096A (en) 1987-11-17 1989-10-31 Eastman Christensen Company Replaceable cutter using internal ductile metal receptacles
US5025875A (en) * 1990-05-07 1991-06-25 Ingersoll-Rand Company Rock bit for a down-the-hole drill
US5588497A (en) 1993-10-28 1996-12-31 Galison Drilling (Proprietary) Limited Mounting drill buttons
US5615747A (en) * 1994-09-07 1997-04-01 Vail, Iii; William B. Monolithic self sharpening rotary drill bit having tungsten carbide rods cast in steel alloys
US5794728A (en) * 1995-06-20 1998-08-18 Sandvik Ab Percussion rock drill bit
US5810103A (en) 1996-12-03 1998-09-22 Sylvan Engineering Company Method and apparatus for mounting PCD compacts
US6105693A (en) * 1999-02-18 2000-08-22 Sandvik Ab Partially enhanced percussive drill bit
US6276467B1 (en) * 1999-10-25 2001-08-21 Driltech Mission Llc Percussive rock drill bit with asymmetric wing

Cited By (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050039954A1 (en) * 2002-08-27 2005-02-24 Brandenberg Kristin R. Method of producing downhole drill bits with integral carbide studs
US7506705B2 (en) * 2002-08-27 2009-03-24 Applied Process, Inc. Method of producing downhole drill bits with integral carbide studs
US20060096788A1 (en) * 2002-11-07 2006-05-11 Stefan Virtanen Reamer assembly
US20050067196A1 (en) * 2003-08-13 2005-03-31 Ramamurthy Viswanadham Shaped inserts with increased retention force
AU2004205106B2 (en) * 2003-08-13 2007-01-04 Sandvik Intellectual Property Ab Shaped inserts with increased retention force
US7416035B2 (en) * 2003-08-13 2008-08-26 Smith International, Inc. Shaped inserts with increased retention force
US10167673B2 (en) 2004-04-28 2019-01-01 Baker Hughes Incorporated Earth-boring tools and methods of forming tools including hard particles in a binder
US9428822B2 (en) 2004-04-28 2016-08-30 Baker Hughes Incorporated Earth-boring tools and components thereof including material having hard phase in a metallic binder, and metallic binder compositions for use in forming such tools and components
US8403080B2 (en) 2004-04-28 2013-03-26 Baker Hughes Incorporated Earth-boring tools and components thereof including material having hard phase in a metallic binder, and metallic binder compositions for use in forming such tools and components
US20070108650A1 (en) * 2005-06-27 2007-05-17 Mirchandani Prakash K Injection molding fabrication method
US8637127B2 (en) 2005-06-27 2014-01-28 Kennametal Inc. Composite article with coolant channels and tool fabrication method
US8808591B2 (en) 2005-06-27 2014-08-19 Kennametal Inc. Coextrusion fabrication method
US8318063B2 (en) 2005-06-27 2012-11-27 TDY Industries, LLC Injection molding fabrication method
US8647561B2 (en) 2005-08-18 2014-02-11 Kennametal Inc. Composite cutting inserts and methods of making the same
US8789625B2 (en) 2006-04-27 2014-07-29 Kennametal Inc. Modular fixed cutter earth-boring bits, modular fixed cutter earth-boring bit bodies, and related methods
US8697258B2 (en) 2006-10-25 2014-04-15 Kennametal Inc. Articles having improved resistance to thermal cracking
US8841005B2 (en) 2006-10-25 2014-09-23 Kennametal Inc. Articles having improved resistance to thermal cracking
US8790439B2 (en) 2008-06-02 2014-07-29 Kennametal Inc. Composite sintered powder metal articles
US8459380B2 (en) 2008-08-22 2013-06-11 TDY Industries, LLC Earth-boring bits and other parts including cemented carbide
US8858870B2 (en) 2008-08-22 2014-10-14 Kennametal Inc. Earth-boring bits and other parts including cemented carbide
US9435010B2 (en) 2009-05-12 2016-09-06 Kennametal Inc. Composite cemented carbide rotary cutting tools and rotary cutting tool blanks
US8272816B2 (en) 2009-05-12 2012-09-25 TDY Industries, LLC Composite cemented carbide rotary cutting tools and rotary cutting tool blanks
US20100296961A1 (en) * 2009-05-19 2010-11-25 Debruin Mark Carbidic outer edge ductile iron product, and as cast surface alloying process
US8136571B2 (en) * 2009-05-19 2012-03-20 Debruin Mark Carbidic outer edge ductile iron product, and as cast surface alloying process
US20100307838A1 (en) * 2009-06-05 2010-12-09 Baker Hughes Incorporated Methods systems and compositions for manufacturing downhole tools and downhole tool parts
US8201610B2 (en) 2009-06-05 2012-06-19 Baker Hughes Incorporated Methods for manufacturing downhole tools and downhole tool parts
US8464814B2 (en) 2009-06-05 2013-06-18 Baker Hughes Incorporated Systems for manufacturing downhole tools and downhole tool parts
US8317893B2 (en) 2009-06-05 2012-11-27 Baker Hughes Incorporated Downhole tool parts and compositions thereof
US8869920B2 (en) 2009-06-05 2014-10-28 Baker Hughes Incorporated Downhole tools and parts and methods of formation
US9266171B2 (en) 2009-07-14 2016-02-23 Kennametal Inc. Grinding roll including wear resistant working surface
US9643236B2 (en) 2009-11-11 2017-05-09 Landis Solutions Llc Thread rolling die and method of making same
US8978734B2 (en) 2010-05-20 2015-03-17 Baker Hughes Incorporated Methods of forming at least a portion of earth-boring tools, and articles formed by such methods
US9687963B2 (en) 2010-05-20 2017-06-27 Baker Hughes Incorporated Articles comprising metal, hard material, and an inoculant
US8905117B2 (en) 2010-05-20 2014-12-09 Baker Hughes Incoporated Methods of forming at least a portion of earth-boring tools, and articles formed by such methods
US9790745B2 (en) 2010-05-20 2017-10-17 Baker Hughes Incorporated Earth-boring tools comprising eutectic or near-eutectic compositions
US8490674B2 (en) 2010-05-20 2013-07-23 Baker Hughes Incorporated Methods of forming at least a portion of earth-boring tools
US8800848B2 (en) 2011-08-31 2014-08-12 Kennametal Inc. Methods of forming wear resistant layers on metallic surfaces
US9016406B2 (en) 2011-09-22 2015-04-28 Kennametal Inc. Cutting inserts for earth-boring bits
USD823908S1 (en) * 2015-05-29 2018-07-24 Atlas Copco Secoroc Ab Rock drill bit
USD831714S1 (en) 2015-05-29 2018-10-23 Atlas Copco Secoroc Ab Rock drill bit
USD826299S1 (en) * 2015-07-17 2018-08-21 The State Of Queensland Through Its Department Of Agriculture And Fisheries Drill corer
USD805114S1 (en) * 2016-01-26 2017-12-12 Roy Jones Traveling rotary valve

Also Published As

Publication number Publication date
US7506705B2 (en) 2009-03-24
US20050039954A1 (en) 2005-02-24
US20040040752A1 (en) 2004-03-04

Similar Documents

Publication Publication Date Title
US3581835A (en) Insert for drill bit and manufacture thereof
US6454030B1 (en) Drill bits and other articles of manufacture including a layer-manufactured shell integrally secured to a cast structure and methods of fabricating same
US6474425B1 (en) Asymmetric diamond impregnated drill bit
US4844185A (en) Rotary drill bits
AU609123B2 (en) Improved bearing structure for downhole motors
EP1531019B1 (en) Refractory metal core wall thickness control
US5452771A (en) Rotary drill bit with improved cutter and seal protection
KR101139748B1 (en) Support pad for long hole drill and method of manufacturing thereof
US4221270A (en) Drag bit
US7226667B2 (en) Cast-iron insert and method of manufacturing same
CA2505828C (en) Modified cutters
US3603414A (en) Insert for drilling unit
US7757785B2 (en) Modified cutters and a method of drilling with modified cutters
CA1068256A (en) Earth-boring drill bits
US6626230B1 (en) Multi-wall core and process
US7600589B2 (en) Rotary drill bits
US6651756B1 (en) Steel body drill bits with tailored hardfacing structural elements
US1923488A (en) Well bit
EP1227213A2 (en) Wear resistant drill bit
JP5514334B2 (en) Modular fixed cutter boring bit, modular fixed cutter boring bit body and a method associated therewith
US7798256B2 (en) Fixed cutter drill bit for abrasive applications
US7832457B2 (en) Molds, downhole tools and methods of forming
CA1295322C (en) Surface protection method and article formed thereby
US6575350B2 (en) Method of applying a wear-resistant layer to a surface of a downhole component
CA2393754C (en) Drilling bit for drilling while running casing

Legal Events

Date Code Title Description
AS Assignment

Owner name: APPLIED PROCESS, INC., MICHIGAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BRANDENBERG, KRISTIN R.;KEOUGH, JOHN R.;HAYRYNEN, KATHY L.;AND OTHERS;REEL/FRAME:013551/0746;SIGNING DATES FROM 20020813 TO 20020819

STCF Information on status: patent grant

Free format text: PATENTED CASE

FPAY Fee payment

Year of fee payment: 4

FPAY Fee payment

Year of fee payment: 8

AS Assignment

Owner name: THE HUNTINGTON NATIONAL BANK, MICHIGAN

Free format text: SECURITY INTEREST;ASSIGNOR:APPLIED PROCESS, INC.;REEL/FRAME:033534/0043

Effective date: 20140813

AS Assignment

Owner name: ALDINE CAPITAL FUND II, L.P., AS AGENT, ILLINOIS

Free format text: SECURITY INTEREST;ASSIGNOR:APPLIED PROCESS, INC.;REEL/FRAME:033549/0917

Effective date: 20140813

FPAY Fee payment

Year of fee payment: 12